zhè / běn / xìng / jiào / yù / dú / wù / yǐ / kè / guān / de / fāng / shì / jiè / shào / le / rǔ / jiāo / de / hán / yì

这本性教育读物以客观的方式介绍了乳交的含义。

This sex education book explains the meaning of mammary intercourse objectively.